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Lateral Arm Flap: Indications and Techniques

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Lateral Arm Flap: Indications and Techniques European Journal of Orthopaedic Surgery & Traumatology (2019) 29:279–284 https://doi.org/10.1007/s00590-019-02363-0 GENERAL REVIEW • UPPERLIMB - MICROSURGERY Lateral arm fap: indications and techniques Zinon T. Kokkalis1 · Efstratios Papanikos1 · George A. Mazis2 · Andreas Panagopoulos1 · Petros Konofaos3 Received: 21 December 2018 / Accepted: 2 January 2019 / Published online: 16 January 2019 © Springer-Verlag France SAS, part of Springer Nature 2019 Abstract The lateral arm fap (LAF) is a popular fap transfer, which can be applied in many procedures. It was frst described in 1982, and till then, even more clinical applications are suggested. It can be used as a free fasciocutaneous or fascial fap to cover small- to medium-sized soft tissue defects in head and neck but also in upper and lower extremity reconstruction, or as an osteocutaneous fap when vascularized bone graft is needed. We present the indications and contraindications, the advantages and disadvantages, as well as the step-by-step technique of harvesting a fasciocutaneous and an osteocutaneous fap and its complications. We conclude that the LAF is a reliable and versatile tool for reconstructive surgery, due to its anatomical characteristics and the low complication rate. Keywords Lateral arm fap · Reconstructive surgery · Microsurgery · Defects Introduction was also reported [5]. The latest series reported by the same group included 11 cases in which the humerus graft was The lateral arm fap (LAF) has been established as a popular used for tibial, mandible, metacarpal, radius and metatarsal fap transfer, which can be applied in many diferent recon- defects [6]. structive procedures such as resurfacing defects in the head The use as a composite tissue transfer is indicated for and neck area, as well as defects of the extremities. The various conditions, such as hand reconstruction, thumb lateral arm fap was frst described by Song et al. [1] as a reconstruction and reconstruction of combined bone and soft free septocutaneous fap that can be customized to cover soft tissue defects in the upper and lower extremity [2, 6, 7]. Such tissue or composite hand defects in diferent topographical defects can result from trauma, pseudoarthrosis, osteomyeli- areas [2]. Later, the reverse lateral fap as a local pedicle tis or tumor resection. Thumb reconstruction was carried out fap was described by Culbertson and Mutimer [3], for the by the use of osteocutaneous neurosensory lateral arm free coverage of soft tissue defects around the elbow joint and faps in a study published by Arnež et al. [8], while fnger in the treatment of post-burn antecubital contractures [3, 4]. reconstruction with a lateral arm fascial fap including a 1.5- Katsaros et al. [5], in 1984, further defned the anatomy and cm segment of the distal humerus was reported by Chen and clinical applications of the fap, such as the use of a lateral El-Gammal [9]. Harpf and colleagues in 1998 described a arm fap in combination with a vascularised part of humerus. series of 72 lateral arm faps, 70 of which were used as fas- They reported that one patient received an osteocutaneous ciocutaneous faps [10]. The LAF as composite fap is also lateral upper arm fap with a bone segment 9 cm long. The indicated for head and neck reconstruction [11, 12]. incorporation of a vascularised portion of the triceps tendon The lateral arm fap has a consistent vascular pedicle, and it can be designed very distally as an extended lateral arm fap. Katsaros et al. [6] and Kuek and Chuan [13] were * Zinon T. Kokkalis the frst to report the clinical use of the “extended” lateral [email protected] arm fap (ELAF) in 1991, as an evolution of the LAF and 1 Department of Orthopaedics, University of Patras, School is designed by an extension of the LAF skin paddle over of Medicine, University Hospital of Patras, Papanikolaou 1, and beyond the lateral epicondyle toward the proximal fore- 26504 Rio, Patras, Greece arm. This modifcation allowed for the use of thinner and 2 Private practice, Athens, Greece more pliable skin from the proximal forearm and a longer 3 Department of Plastic Surgery, University of Tennessee pedicle length. The ELAF has been also termed as lateral Health Sciences Center, Memphis, TN, USA Vol.:(0123456789)1 3 280 European Journal of Orthopaedic Surgery & Traumatology (2019) 29:279–284 arm/proximal forearm fap, lateral forearm fap [14], distally adjacent muscles, but run between the lateral intermuscular planned LAF, “extreme” LAF or “true” distal LAF [15]. septum and the muscles to the underlying bone allowing the lateral supracondylar ridge to be transferred without impairing the muscles. The second group of periosteal arter- Anatomy of the fap ies arises from muscular branches, which in turn originate from the PRCA; their origins are scattered among the origins The lateral arm fap is supplied by septocutaneous perfora- of the direct periosteal vessels of the frst group. After the tors of the posterior branch of the radial collateral artery muscular branches enter the muscles, small vessels split of (PRCA) [5, 16–18] and may include bone, muscle, tendon, and run nearly perpendicular to the surface of the underly- nerve, fascia and skin. The profunda brachii artery (PBA) ing bone at the site of muscle insertion. These two groups arises in the middle between the acromion and lateral of periosteal arteries give of into a rich network, mainly on humeral epicondyle, and after it passes posteriorly down the the dorsal part of the humerus [16]. spiral groove, it divides into two main branches: the middle collateral artery and the radial collateral artery. The mid- dle collateral artery runs down into the medial head of the Designing the fap triceps, whereas the radial collateral artery continues along with the radial nerve. Before reaching the lateral intermus- The fap is outlined on the distal third of the lateral aspect cular septum (LIS), the radial collateral artery splits into of the arm. The axis of the skin island of the fap is centered two branches: the anterior branch of the radial collateral with a line drawn from the deltoid insertion to the lateral epi- artery (ARCA) and the posterior branch of the radial collat- condyle, which corresponds to the lateral intermuscular sep- eral artery (PRCA). The ARCA is not suitable to provide the tum (Fig. 1). The axis of the pedicle passes along the lateral basis of the fap because of its variation and the proximity of intermuscular septum, which is traced between the lateral the radial nerve. The main branch of the RCA that supplies head of the triceps muscle posteriorly and the brachialis and the lateral arm fap is the PRCA [5, 16, 17]. The PRCA trav- brachioradialis muscles on the anterior side. The fap pattern els through the lateral intermuscular septum between triceps depends upon the defect which has to be covered. The more posteriorly and brachialis and brachioradialis anteriorly. It distal the fap is made, the thinner the skin. Giving to the gives of four or fve septocutaneous perforators along the size of the defect, the dimensions of the fap can be extended intermuscular septum and ends into the epicondylar and over and beyond the lateral epicondyle as an extended lateral olecranon network. It eventually anastomoses around the arm fap (ELAF). Flap width commonly should not exceed lateral epicondyle with the interosseous recurrent artery [16, 6 cm to allow for primary skin closure of the donor defect. 19]. The length of the pedicle is 3.9 cm (range 1.5–6.0 cm), on the anterior aspect of the triceps brachii muscle, but it may reach 7–8 cm by following the vessels to the radial Harvesting technique groove [16]. Venous drainage is through one or two concomitant veins The patient is placed in the supine position and the fap can that accompany the PRCA, emptying into the profunda bra- be harvested with the upper limb on an arm table or with chii veins. Additionally, a superfcial venous system drains the arm lying on the chest and the elbow in fexion. The into the deep veins as well as into the cephalic vein, which entire arm, including the shoulder, is prepped to the axilla. courses through the anterior region of the LAF area, empty- A sterile tourniquet may be used for the procedure and must ing into the axillary vein. be placed high up in the arm. If the tourniquet interferes Two nerves should be considered in the region. The lower with proximal dissection, it must be defated at the latter lateral brachial cutaneous nerve (LBCN), arising directly part of fap harvest. Alternatively, a narrow (6–10 cm width) from the radial nerve, provides sensory innervation to the Esmark rubber tourniquet can be applied under moderate skin of the lateral upper arm; and the posterior antebra- tension. chial cutaneous nerve (PACN) innervates a more distal skin The lateral arm flap is outlined with a surgical skin area, inferior to the lateral epicondyle, that is used for the marker along with the proximal incision to expose the pedi- extended lateral arm fap [12]. cle of the fap, which lies over the lateral intermuscular sep- The lateral supracondylar ridge of the humerus, a fre- tum. Posterior fap elevation is performed frst. The posterior quently used source of bone for transfer, is vascularised by fap is elevated deep to the muscular fascia over the triceps, two groups of arteries [16]. The frst group consists of peri- which is peeled anteriorly until the septum is encountered. osteal branches that originate from the PRCA and follow a This fascia is included in the fap to preserve vascularity direct course to the bone anterior and posterior to the lateral [20]. The fascia is sutured with two to three stitches to the intermuscular septum.
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